A bright reflective LCD without a backlight is a key device for portable information systems. This paper proposes a new Guest-Host type liquid-crystal display. It consists of a light control film (LCF), a phase change type Guest-Host (PCGH) liquid-crystal layer and a mirror substrate. The device does not need a polarizer that absorbs at least half of the incident lights. The structure is simple in comparison to the reflective PCGH LCD with a geometrically controlled reflection mirror. Optimization of the characteristic of LCF in the new device will promise a very bright reflective LCD.